Coordination Compounds · Chemistry · AP EAPCET

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MCQ (Single Correct Answer)

1

Which of the following exhibit ionisation isomerism?

I. $\left[\mathrm{Cr}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right] \mathrm{Cl}$

II. $\left[\mathrm{Ti}\left(\mathrm{H}_2 \mathrm{O}\right)_5 \mathrm{Cl}\right]\left(\mathrm{NO}_3\right)_2$

III. $\left[\mathrm{Pt}(\mathrm{en})\left(\mathrm{NH}_3\right) \mathrm{Cl}\right] \mathrm{NO}_3$

IV. $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4\left(\mathrm{NO}_3\right)_2\right] \mathrm{NO}_3$

AP EAPCET 2025 - 26th May Morning Shift
2

Identify the set which does not have ambidentate ligand(s)

AP EAPCET 2025 - 27th May Morning Shift
3

The IUPAC name of the complex shown below is $\mathrm{K}_3\left[\mathrm{Co}(\mathrm{ox})_3\right]$

AP EAPCET 2025 - 26th May Evening Shift
4

The coordination number of chromium in $\mathrm{K}\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_2\left(\mathrm{C}_2 \mathrm{O}_4\right)_2\right]$ is

AP EAPCET 2025 - 24th May Morning Shift
5

Identify the complex ion with spin only magnetic moment of 4.90 BM .

AP EAPCET 2025 - 23rd May Evening Shift
6

In which one of the following complexes the metal ion has $t_{2 g}^3 e_g^2$ configuration?

AP EAPCET 2025 - 23rd May Morning Shift
7

In $\mathrm{Fe}_x\left[\mathrm{Fe}_y(\mathrm{CN})_6\right]_3, x, y$ respectively, are

AP EAPCET 2025 - 22nd May Evening Shift
8

In which of the following, complex ions are not in correct order with respect to their magnitude of crystal field splitting?

AP EAPCET 2025 - 22nd May Morning Shift
9

Which of the following complexes exhibit geometrical isomerism?

I. $\left[\mathrm{Co}(\mathrm{en})\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}_2\right] \mathrm{Cl}$

II. $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right] \mathrm{Cl}$

III. $\left[\mathrm{Co}(\mathrm{en})_3, \mathrm{Cl}_3\right.$

IV. $\left[\mathrm{Co}(\mathrm{en})_2 \mathrm{Cl}_2\right] \mathrm{Br}$

AP EAPCET 2025 - 21st May Morning Shift
10

Arrange the following in the increasing order of their magnetic moments

I. $\left[\mathrm{Mn}(\mathrm{CN})_6\right]^{3-}$

II. $\left[\mathrm{Mn} \mathrm{Cl}_6\right]^{3-}$

III. $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}$

IV. $\left[\mathrm{FeF}_6\right]^{3-}$

AP EAPCET 2024 - 23th May Morning Shift
11
Which complex among the follwing is most paramagnetic?
AP EAPCET 2024 - 22th May Evening Shift
12

Match the complexes in List-I with their hybridisation in list-II.

List-I
(Complex)
List-II
(Hybridisation)
I $$
\mathrm{Ni}(C O)_4
$$
A $$
s p^3 d^2
$$
II $$
\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}
$$
B $$
d^2 s p^3
$$
III $$
\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}
$$
C $$
d s p^2
$$
IV $$
\left[\mathrm{CoF}_6\right]^{3-}
$$
D $$
s p^3
$$
AP EAPCET 2024 - 22th May Morning Shift
13
Cobalt (III) chloride forms a green coloured complex ' $X$ ' with $\mathrm{NH}_3$. Number of moles of AgCl formed when excess of $\mathrm{AgNO}_3$ solution is added to 100 mL of 1 M solution of ' $X$ ' is
AP EAPCET 2024 - 21th May Evening Shift
14

Improve silver ore $+\mathrm{CN}^{-}+\mathrm{H}_2 \mathrm{O} \xrightarrow{\mathrm{O}_2}[\mathrm{X}]^{-}+\mathrm{OH}^{-}$

$$ [X]^{-}+\mathrm{Zn} \longrightarrow[Y]^{2-}+\mathrm{Ag} \text { (pure) } $$

The co-ordination numbers of the metals in $[X]$. [ $Y$ ] are respectively

AP EAPCET 2024 - 21th May Morning Shift
15

How many of the following ligands are stronger than

$$ \begin{aligned} & \mathrm{H}_2 \mathrm{O} \text { ? } \\ & \mathrm{S}^{2-}, \mathrm{Br}^{-}, \mathrm{C}_2 \mathrm{O}_4^{2-}, \mathrm{CN}^{-} \text {, en, } \mathrm{NH}_3, \mathrm{CO}, \mathrm{OH}^{-} \\ & \begin{array}{ll} \text { } & \text { } \end{array} \end{aligned} $$

AP EAPCET 2024 - 21th May Morning Shift
16

Arrange the following in the increasing order of number of unpaired electrons present in the central metal ion

I. $\left[\mathrm{MnCl}_6\right]^{3-}$

II. $\left[\mathrm{FeF}_6\right]^{3-}$

III. $\left[\mathrm{Mn}(\mathrm{CN})_6\right]^{3-}$

IV. $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}$

AP EAPCET 2024 - 20th May Evening Shift
17
The paramagnetic complex ion, which has no unpaired electrons in $t_{2 g}$ orbitals is
AP EAPCET 2024 - 20th May Morning Shift
18
The spin only magnetic moments of the complexes $\left[\mathrm{Mn}(\mathrm{CN})_6\right]^{3-}$ and $\left[\mathrm{Co}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]^{3-}$ are respectively.
AP EAPCET 2024 - 19th May Evening Shift
19

An element '$$X$$' with the atomic number 13 forms a complex of the type $$[\mathrm{XCl}(\mathrm{H}_2 \mathrm{O})_5]^{2+}$$. The covalency and oxidation state of $$X$$ in it are respectively

AP EAPCET 2022 - 5th July Morning Shift
20

Identify the species, which does not exist?

AP EAPCET 2022 - 5th July Morning Shift
21

The homoleptic complex in the following is

AP EAPCET 2022 - 5th July Morning Shift
22

The crystal field theory is successful in explaining which of the following?

I. Ligands as point charges.

II. Formation and structures of complexes.

III. Colour.

IV. Magnetic properties.

V. Covalent character of metal-ligand bonding.

AP EAPCET 2022 - 4th July Evening Shift
23

Which of the following is correct related to the colours of $$\mathrm{TiCl}_3(X)$$ and $$\left[\mathrm{Ti}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right] \mathrm{Cl}_3(Y)$$ ?

AP EAPCET 2022 - 4th July Morning Shift
24

$$\mathrm{AlF}_3$$ is soluble in HF only in the presence of KF due to formation of

AP EAPCET 2021 - 20th August Morning Shift
25

Potassium cyanide is made alkaline with NaOH and boiled with thiosulphate ions. The solution is cooled and acidified with HCl and this solution with iron (III) chloride produces

AP EAPCET 2021 - 20th August Morning Shift
26

Which of the following complexes formed by nickel is tetrahedral and paramagnetic?

AP EAPCET 2021 - 20th August Morning Shift
27

What is coordination number of the metal in $$\mathrm{{[Co{(en)_2}C{l_2}]^{2 + }}}$$ ?

AP EAPCET 2021 - 19th August Morning Shift